#include<stdio.h>
#include<math.h>
int main()
{
	int a,b,c;
	scanf("%d %d %d",&a,&b,&c);
	float  circumference,area,p;
	circumference=a+b+c;
	p=circumference/2.0;
	area=sqrt(p*(p-a)*(p-b)*(p-c));
	printf("circumference=%.2f area=%.2f",circumference,area); 
	return 0;
}
